how to fix the remote start issues on my Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

513 words

Problem Statement

Learn how to diagnose and fix remote start issues in Toyota Highlander (2014-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits.

Symptoms

•Remote start button does not respond when pressed
•Check engine light illuminated
•Vehicle does not start when attempting remote start
•Intermittent starting issues when using the key fob
•Security system light flashing or illuminated

Diagnostic Steps

1
Verify the remote start system is equipped on the vehicle and check the owner's manual for specific instructions.
2
Check the battery in the key fob using a multimeter to ensure it has sufficient voltage.
3
Inspect the vehicle's battery for proper voltage and connections.
4
Scan for diagnostic trouble codes (DTCs) using an OBD-II scanner.
5
Check fuses related to the remote start system in the fuse box.
6
Inspect the wiring and connections for the remote start module for any signs of damage or corrosion.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Multimeter
•Flathead screwdriver
•OBD-II scanner

Parts Required

•CR2032 key fob battery

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Verify the remote start system is equipped on the vehicle and check the owner's manual for specific instructions.
2
Check the battery in the key fob using a multimeter to ensure it has sufficient voltage.
3
Inspect the vehicle's battery for proper voltage and connections.
4
Scan for diagnostic trouble codes (DTCs) using an OBD-II scanner.
5
Check fuses related to the remote start system in the fuse box.
6
Inspect the wiring and connections for the remote start module for any signs of damage or corrosion.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shock during repairs.

2. Key Fob Battery Replacement

Open the key fob using a small flathead screwdriver.
Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
Reassemble the key fob securely.

3. Vehicle Battery Inspection

Inspect the vehicle battery terminals for corrosion and clean if necessary.
Ensure the battery is fully charged (at least 12.6 volts) using a multimeter.
If the battery is weak or old, replace it with a new one.

4. Fuse Inspection

Locate the fuse box in the vehicle (refer to the owner's manual).
Identify the fuses related to the remote start and check for continuity using a multimeter.
Replace any blown fuses with the same amperage rating.

5. Wiring and Connection Check

Inspect the remote start module wiring for any visible damage or disconnections.
Reconnect any loose wires and repair any damaged sections with appropriate electrical tape or connectors.
Ensure all connectors are secure and free of corrosion.

6. Reconnect Battery and Test

Reconnect the vehicle battery.
Test the remote start feature by pressing the remote start button on the key fob.